کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145343 | 1462070 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical hydrogen sensing with nanoparticulate Pd-Au films produced by spark ablation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We have produced nanoparticulate Pd-Au (88-12Â at.%) thin films using, for the first time, spark ablation and inertial deposition on glass substrates. Films having thicknesses that range from ca. 150 to 200Â nm exhibit high enough contrast (i.e., range of optical transmittance) and negligible hysteresis during H2 adsorption/desorption cycles, thereby providing an almost one-to-one relation between applied H2 pressure and transmittance. Films having thicknesses larger than 200Â nm exhibit hysteresis, which can be attributed to the cracks formed by the higher mechanical stresses associated with phase transition of the film during H2 absorption and/or desorption. All samples exhibit a reasonably stable response upon cycling at room temperature. Their response times are less than 30Â s, which are considerably shorter compared to those of their counterparts produced by sputtering. Considering that the method used to produce the nanoparticulate films is simple and inexpensive, the findings reported in this paper open new opportunities for the design, optimization and production of optical H2 gas sensors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 221, 31 December 2015, Pages 290-296
Journal: Sensors and Actuators B: Chemical - Volume 221, 31 December 2015, Pages 290-296
نویسندگان
N.A. Isaac, P. Ngene, R.J. Westerwaal, J. Gaury, B. Dam, A. Schmidt-Ott, G. Biskos,